GhostBSD4.0 Installation questions

Which version of Shell I have to choose according to you? There is a choice of 8 versions: bash, csh, fish, ksh, rbash, sh, tcsh, zshfish is the default selected shell. Can I go for fish?

Fish is the default shell and I recommend it to every one.

Why does the installation seems very long when copying files?

It is copying over 8Gb of file which take time.

What is the first thing to do after the installation process is finished? sudo pkg update"pkg update" is the right packages manager? Because I'm new and confused with the wiki that says in some cases "bxpkg" and in other cases of "pkg"?

bxpkg was our graphical packages manager before pkgng replace pkgsrc.pkgng is the default Package Manager it is a CLI Package Manager and is pkg, update is an option like install, upgrade, help.Help option is useful to have more detail one pkg command.